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At a point in a material under stress, the intensity of resultant stress on a certain plane (AB) is 60 N/mm2 (tensile) inclined at 30° to the normal to that plane. The stress on an another plane (CA) at right angles to this has a normal tensile component of intensity 40 N/mm2. Find
a. the resultant stress on second plane
b. the principal stresses and orientations
c. maximum shear stress and orientations
A piston-cylinder assembly contains air at 227C and 300 kPa. Heat is supplied from a reservoir at 900 K causing the air to expand the path Pv^1.2 constant until the pressure is 200 kPa. The surroundings are at 27C and 95 kPa. Determine the second law..
a 2.0 kg of water at 90 deg. c and 1 bar is placed in a vertical cylinder and sealed with a massless piston. the piston
It is known that the kinetics of recrystallization for some alloy obey the Avrami equation, and that the value of n in the exponential is 8.4. If, at some temperature, the fraction of recrystallization is .30 after 100 min, determine the rate of r..
a system of equivalent mass 30kg has a natural frequency of 120radsec and damping ratio of 0.12. the system is subject
Steam flowing at 3 kg/s through a nozzle operating at steady state expands from the inlet at 20 bar, 280 0 C to the exit at 7 bar, 180 0 C. The inlet velocity is 90 m/s. Neglecting heat transfer, determine (a) the exit velocity in m/s and (b) the inl..
1 for a separations process it is necessary to determine the vle compositions of a mixture of ethyl bromide and
The Realtor assumes prices of midrange homes are normally distributed and the variance in prices in the two cities is about the same. What would he obtain for a 90% confidence interval for the difference in mean prices of midrange homes between P..
danica traveling at a speed of 200 kmhr on a straight road applies brakes to her car at point a and reduces her speed
a roast is in an oven and weighs 2.25 kg. it is initially at 6 degrees celsius and needs to be heated to 80 degrees
a boiler shell is 1.5m in diameter and has plates of thickness 10mm. if the efficiency of the longitudinal joint is 80
A living plant leaf is an open system that exchanges energy (sunlight and thermal flows) + matter (O2, CO2, water vapor, etc.) with the surroundings (the exterior). Even with irreversible processes (energy dissipation) we find that the net entropy ch..
The system rotates freely about the vertical spindle BE. After a period of slippage, disk D rolls without slipping. Knowing that the magnitude of the final angular velocity of disk D is 176 rpm, determine the final angular velocities of bar BC and..
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